1.目录pop3高级程序开发是一个能够从pop3服务器中检查所有邮件，并且可以查看邮件内容，也可以删除邮件但是没有实现附件的接收，使用时需要设定服务器地址以及用户名和密码；

2.目录简单的邮件发送是一个很简单的邮件发送程序，能够发送普通的文本内容；

3.目录邮件发送高级编程是一个高级的邮件发动程序，能够设定smtp的验证，同时也能够发送附件，还能够设定各种编码以及数据加密。

-1. Directory pop3 is a senior program development from the pop3 server to check all mail, and can view e-mail content, can also delete the message but did not achieve the annex to the receipt, use need to configure the server address and user name and password　2. Directory simple e-mail is a very simple e-mail program that can send the text of the ordinary　3. directory of e-mail high-level programming is an advanced e-mail to launch the procedure can be set up smtp authentication, but also be able to send attachments, but also can set the various coding and data encryption.